Implement __set_state() for all AST node classes

Add __set_state() magic method to all 68 AST node classes to enable
var_export() serialization for caching purposes.

Implementation details:
- All classes now support reconstruction via var_export()
- Constructor parameters are properly extracted from properties array
- Attributes are restored after instance creation
- Optional parameters handled with null coalescing operator

Classes updated:
- Type nodes: 20 classes (ArrayTypeNode, GenericTypeNode, etc.)
- ConstExpr nodes: 10 classes (ConstExprArrayNode, ConstFetchNode, etc.)
- PhpDoc core: 4 classes (PhpDocNode, PhpDocTagNode, etc.)
- PhpDoc tag values: 29 classes (ParamTagValueNode, ReturnTagValueNode, etc.)
- Doctrine nodes: 5 classes (DoctrineAnnotation, DoctrineArray, etc.)

All tests pass (3711 tests, 19858 assertions)
PHPStan analysis passes with no errors

Author: claude

src/Ast/ConstExpr/ConstExprArrayItemNode.php

@@ -30,4 +30,18 @@ public function __toString(): string
 		return (string) $this->value;
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['key'], $properties['value']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprArrayNode.php

@@ -26,4 +26,18 @@ public function __toString(): string
 		return '[' . implode(', ', $this->items) . ']';
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['items']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprFalseNode.php

@@ -14,4 +14,18 @@ public function __toString(): string
 		return 'false';
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self();
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprFloatNode.php

@@ -21,4 +21,18 @@ public function __toString(): string
 		return $this->value;
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['value']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprIntegerNode.php

@@ -21,4 +21,18 @@ public function __toString(): string
 		return $this->value;
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['value']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprNullNode.php

@@ -14,4 +14,18 @@ public function __toString(): string
 		return 'null';
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self();
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprStringNode.php

@@ -76,4 +76,18 @@ private function escapeDoubleQuotedString(): string
 		}, $escaped);
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['value'], $properties['quoteType']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstExprTrueNode.php

@@ -14,4 +14,18 @@ public function __toString(): string
 		return 'true';
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self();
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/ConstFetchNode.php

@@ -30,4 +30,18 @@ public function __toString(): string
 		return "{$this->className}::{$this->name}";
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['className'], $properties['name']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }

src/Ast/ConstExpr/DoctrineConstExprStringNode.php

@@ -38,4 +38,18 @@ private static function escape(string $value): string
 		return sprintf('"%s"', str_replace('"', '""', $value));
 	}
 
+	/**
+	 * @param array<string, mixed> $properties
+	 */
+	public static function __set_state(array $properties): self
+	{
+		$instance = new self($properties['value']);
+		if (isset($properties['attributes'])) {
+			foreach ($properties['attributes'] as $key => $value) {
+				$instance->setAttribute($key, $value);
+			}
+		}
+		return $instance;
+	}
+
 }